Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 507126
Title Calcium binding restores gel formation of succinylated gelatin and reduces brittleness with preservation of the elastically stored energy
Author(s) Baigts Allende, Diana; Jongh, H.H.J. de
Source Journal of Agricultural and Food Chemistry 63 (2015). - ISSN 0021-8561 - p. 7058 - 7065.
DOI http://dx.doi.org/10.1021/acs.jafc.5b01962
Department(s) Physics and Physical Chemistry of Foods
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) Gelatin - protein gel - succinylation - Calcium binding - rheology
Abstract To better tailor gelatins for textural characteristics in (food) gels, their interactions are destabilized by introduction of electrostatic repulsions and creation of affinity sites for calcium to “lock” intermolecular interactions. For that purpose gelatins with various degrees of succinylation are obtained. Extensive succinylation hampers helix formation and gel strength is slightly reduced. At high degrees of succinylation the helix propensity, gelling/melting temperatures, concomitant transition enthalpy, and gel strength become calcium-sensitive, and relatively low calcium concentrations largely restore these properties. Although succinylation has a major impact on the brittleness of the gels formed and the addition of calcium makes the material less brittle compared to nonmodified gelatin, the modification has no impact on the energy balance in the gel, where all energy applied is elastically stored in the material. This is explained by the unaffected stress relaxation by the network and high water-holding capacity related to the small mesh sizes in the gels.
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